Talk:Pyrene

I may be wrong, but since Pyrene is aromatic, shouldn't the diagram show rings (similar to Benzopyrene) rather than double and single bonds? It appears to have two (identical, i.e. flipping one gives the other) resonance forms, giving all bonds equal precedence at being single or double. - Nanobug 16:58, 13 September 2005 (UTC)

That's unnecessary, it is evident from the connected system of double bonds. Diagrams such as this are always artificial representations -bonds as connecting lines don't exist anyway. Drawing the different resonance forms is a way to illustrate to the student why the electron density is in fact the same everywhere, but of course, no bond-flipping actually takes place -the electrons simply distribute equally. Since that can be seen from the single structure, adding another resonance structure doesn't really add information. --OliverH 12:48, 2 March 2006 (UTC)

About the nomenclature of polycyclic hydrocarbon

On the basis of the von Baeyer system, pyrene can be named as"tetracyclo[6.6.2.0^4,16.0^11,15]hexadeca-1,3,5,7,9,11,13,15-octaene", which derived from Extension and Revision of the von Baeyer System for Naming Polycyclic Compounds (Including Bicyclic Compounds). IUPAC Recommendations 1999, Pure Appl. Chem., 1999, 71, 513-529. 339847214sd (talk) 16:21, 6 May 2019 (UTC)

Yes - but "tetracyclo[6.6.2.04,16.011,15]hexadeca-1,3,5,7,9,11,13,15-octaene" does not seem to appear in the cited PDF document (at => http://publications.iupac.org/pac/pdf/1999/pdf/7103x0513.pdf ) after a search - perhaps a better ref would be better? - iac - Enjoy! :) Drbogdan (talk) 16:52, 6 May 2019 (UTC)

Just said, it's a derivation. It is absolutely impossible to list all of them, otherwise this document will never be finished. 1,3-butadiene and cyclopentadienyl anion can be named as when their Pi electrons isolated, why can't the compound with benzene(cyclohexatriene) rings follow this? See my opinion at Talk:Benzene#Cyclohexatriene is not benzene. Moreover, several structures with benzene rings are also given in this cited document. 339847214sd (talk) 01:21, 7 May 2019 (UTC)

Two comments on the well-intentioned remark "On the basis of the von Baeyer system, pyrene can be named as"tetracyclo[6.6.2.0^4,16.0^11,15]hexadeca-1,3,5,7,9,11,13,15-octaene":

• creating nomenclature, esp when obscure or cumbersome, seems to be an exercise in original research.
• Wikipedia is not bound or a signatory to IUPAC nomenclature, and one can see reasons to ignore that nomenclature is ridiculously cumbersome.--Smokefoot (talk) 18:03, 6 May 2019 (UTC)

@Drbogdan, @Smokefoot: On the side of caution, I had put it in the column "Other Names" instead of "Systematic IUPAC Name". If I say “93100082+2=93100084”, do I need to find articles that this sentence clearly appeared in? 339847214sd (talk) 07:51, 12 May 2019 (UTC)

User:339847214sd: This seems like a good time to either find another theme to edit about or find a mentor to talk to about editing behavior.--Smokefoot (talk) 12:37, 12 May 2019 (UTC)

Clar's Rule Representation

Can the picture of pyrene be changed to follow Clar's rule? The currently one only includes one benzene sextet, while the correct representation is two benzene sextets and two double bonds which represent the k region of the molecule.

Polypyrene

Any notes on polimerization of pyrene into polypyrene? It is interesting, flexible, and conductive polymer. Finding potential use in electrochemical cell anodes. 81.6.34.246 (talk) 22:01, 8 July 2019 (UTC)